group 10 anthony muller gerald tyberghein joshua wood
TRANSCRIPT
Group 10Anthony Muller
Gerald TybergheinJoshua Wood
One Box Gunnery TrainerFinal Design
Overview
• The Advanced Gunnery Trainer System• The Pelican-Hardigg Case• Product Specifications• Concepts• Selection• Final Concept Design• Analysis • Tipping• FEM• Cost
• Possible Improvements• Next Semester
The Advanced Gunnery Trainer System(AGTS)
Figure 1: Lockheed Martin TAGTS Source(www.lockheedmartin.com)
• Compact, cost efficient tabletop system
• Used to sustain precision gunnery skills at all levels
• Provides training procedures, basic skills, and drills
• Can be linked together with other AGTSs
The Pelican-Hardigg Case
Figure 2: Pelican-Hardigg case in military use Source: Pelican-Hardigg Case (www.pelican.com) Figure 4: Wheel transport
Source: (www.pelican.com)
Figure 3: Dual lid case opened to show rack Source: (www.pelican.com)
Product Specifications• Weighs less than 120 lbs
• Gunner handle and monitor mounted in correct tactical position
• Equipment must be safe when being transported
• Packing does not interfere with components’ cooling
• System must be stable (15 degree tip)
• System must be durable
• Easy to set up
Figure 5: Current TAGTS setup Source: Payne, Jeffrey
Main Concepts
Figure 6 : Tabletop, Box on Floor, Hybrid Concepts.
Selection Matrix
Tabletop Box on Floor Hybrid
Specifications Weight(/100%)
Rating(1-5)
Weighted Scores
Rating Weight scores
Rating Weighted scores
Ease of Assembly
15% 3 0.45 4 0.6 3 0.45
Durability 20% 4 0.8 2 0.4 1 0.2
Lightweight 30% 4 1.2 3 0.9 4 1.2
User Friendly 10% 3 0.3 4 0.4 3 0.45
Portability 10% 2 0.2 2 0.2 2 0.2
Stability 15% 4 0.6 2 0.3 1 0.15
Score 0.59 0.47 0.44
Selection Yes
Table 1: Selection Matrix for 3 Concepts
Finalized Concept
Figure 7 : Case Packed Position
Figure 8 : Side View Inside Case
Satisfying Weight Specification
Case weight : 52 lbs
Components’ total weight : 40 lb
Mounting equipment’s weight : 15 lbs
Miscellaneous hardware weight : 5 lbs
Total weight : 112lbs
Product specification weight : Under 120 lbs
Satisfying Correct Mounting Position and Ease of Assembly Specifications
Figure 9: Person Using TAGTS
Satisfying Stability Specification: Maximum Input Force Analysis
Figure 10 : Force Distribution of Deployed System
Tip Analysis
• Set left side normal force equal to 0, to assume tipping.
• Take moments about right side normal force, and solve for the input force on the handle.
112lbs(8.62in) – F(16.67in) = 0
Maximum applied downward force on handleF = 58 lbs
Satisfying Stability Specification: Maximum Tip Angle Analysis
Figure 11 : Maximum Angle of Deployed System
Tip Analysis
• Tipping occurs when left normal force is equal to 0 and center of gravity passes the right normal force.
• Solving for this angle, theta=atan(8.62/8.3) = 46deg
• Product specification: Satisfy 15 degree tip rule
Satisfying Transportation Safety :MIL-STD-810 Test“…a generally accepted standard of ruggedisation for testing and compliance for mobile computers and equipment.” (Secure Systems and Technologies)
• Mechanical Shock
• Random Mechanical Vibration
• Altitude Figure 12 : Vibration TestSource: Qualtest (www.qualtest.com)
Satisfying Durability Specification: Shock Mounts
For our case model:
• Shock mounts rated for 50-70G fragility
• Provide shock and vibration dampening for systems weighing 20-200lbs
• Provides cooling airflow Figure 13 : View of Shock MountsSource: Pelican-Hardigg Case (www.pelican.com)
FEM Analysis
Figure 14 : Stress Distribution of von Mises
Lbm/(in sec^2)
FEM Analysis
Figure 15 : Stress Distribution of the Maximum Principle Stresses
Lbm/(in sec^2)
Item End Product Cost Required for Project Project Cost
Box 1800 0
MonitorBracket
700200 √
0200
ComputerBracket
50065 √
065
KeyboardMount in Lid
7025 √
025
Mouse 20 0
Headset 300 0Handle Bracket
USB Interface
Proprietary150
Proprietary√
0150
0Power Strip
Mount455
√√
455
Cable Management 50 √ 50Total 3930+ 540+
Cost Analysis Table 2 : Cost Analysis
Possible Improvements
• Add attachable legs to increase portability
• Utilize touchscreen to eliminate mouse and keyboard
• Incorporate handle design from Senior Design Team 9 to allow for other vehicle simulations
Figure 16 : Pelican Legs Source:(www.pelican.com)
Next Semester…
• Install mounting equipment into Pelican case
• Machine mockup components to mount in case to test
• Visit General Dynamics Lab Systems
• Visit Qual Test Labs to run tests and analyze results
• Bring system to Lockheed Martin to implement real components in case and run tests.
References
Lockheed Martin. The Advanced Gunnery Trainer System (AGTS) Tabletop Trainer. Lockheed Martin. Www.lockheedmartin.com. Web. 31 Oct. 2010. Pelican. Pelican Hardigg Cases. Pelican, 2010. Www.pelican.com. Web. 03 Nov 2010.
Qualtest. Www.qualtest.com/index. Web. 10 Nov 2010
Secure Systems and Technologies. MIL-STD-810 Overview. Secure Systems and Technologies. http://www.sst.ws/images/downloads/MIL-STD-810%20overview%20iss%205.pdf. Web. 31 Oct. 2010.
Acknowledgements
Sponsor – Lockheed Martin - Jeffrey Payne (Mechanical Engineer)
Sponsor – Pelican Hardigg - Daria Boley (Pelican Hardigg Salesperson)
Advisors –- Dr. Rob Hovsapian- Dr. Patrick Hollis- Dr. Srinivas Kosaraju - Ms. Shannon Ingersoll- Mr. Joseph Trpisovsky